Lift



Dec. 25, 1934. R. J. JAUCH ET AL LIFT Filed Feb. 2'7, 1934 2 Sheets-Sheet 2 Ill . vllllllilllllllllllllIll!!!lfflllililllillllllflll Illllllllrllllll' lIllll fizz/6W5: Jiaberi JJauc/z,

\Y llllllllllillh PatentedDec. 25, 1934 Bobert J. Jauch and'RossI-IgArnol d, Fort Wayne J Ind, assignors toWayne Company, Fort-Wayne, I Ind.,'aeorporationof Indiana 1.

This invention relates to lifts, and more particularly to mechanically operated lifts for servicing vehicles such as automobiles. i

It is an object of this invention toprovide a 5 mechanical lift which is positively operated to raised and lowered positions for permitting the .readyservicing of vehicles such as automobiles. Another object is to provide:an..electrically operated screw type hoist. L t

.Still another object. is to provideahoist for servicing automobiles whiclris mechanically operated and which maybe revolved to different positions topermit automobiles tobe conveniently run onand off the-lift. v l5 A further object is to provide 'a'mechanical lift which automatically. ceases movement at-pre determined positions.

A yet furthervobjectis to provideamechanical lift which is readily operable, is inexpensive. to make and maintain, and fulfills all requirements of manufacture andvservice. 1* With these and; various other, objects in view, the invention may consist of certain novelfeatures of construction and'operation as will be more fully described andparticularly pointed out .in the specification, drawings and claims appended hereto... w v a l Inkthe drawings, which illustrate an embodiment, of the device and wherein; like reference characters are used to designate like parts- 5 i Figure l isxatop plan view of a liftgembodying theinventiony l q Figure 2 is an enlarged fragmentary; sectional elevation through the operating mechanism of the lift; y z.

Figure 3 is a top plan viewof the nut through which the operatingscrew is. adapted to be threaded; 1, t 4 Figure! isa sideelevation of the nut shownin Figure3. I

Ina lift of the type shown, spaced rails are connected by meansofza crosshead '12,, therails being spaced apart aiconvenient distanceto allow an automobile or other vehicle to be run on or oil? the rails. As shown, eachof the rails is provided at "each 1 end thereof with the approach members 14 and the chocks .16 which. mayor may not be automatic. Convenient fadjustablej;holde ers 18 may also be provided on eachmf-the rails for accommodating a, receptacle for receiving oil or other liquid orsemi-liquid or wastedrained or removed fromthevehicle: being serviced.'-. The crosshead lzmay be built upby the spaced angles 20 and' center plate22"bolted OIHOthBIWlSB, se-

cured to the collar-24, which centerlplate may or .maysnotbea part of said crosshead and used as;a motor support. 1 i

A central cylindrical slidable sleeveor plunger 26-issecured to said crosshead, open at its lower ,end and insliding cooperation with the stufiing 5 :box. or gland 28Eprovided on the upper plate 30 which is adapted to be disposed substantially flush with the ground or associated floor in which thelift mechanism is imbedded. The outer casing 32 is likewise secured to the plate 30 and is 10 closed at its end by means of the .lowerclosure plate 34, said lower. closure plate havingv an upwardly extending inner casing or tubular-member 36 secured thereto and concentric with the outer casing and the'slidable' sleeve. The outer, casl5 ing is also provided with spaced positioning rings 381 with which the plunger 26 has sliding and guiding cooperation. g 3 i- 1 The nut40 is provided at;the upper; end of the inner casing efi, said nut having a body portion 20 42- substantially, cylindrical; and journaled in the upper, end ofthecasing-(ifi. The cylindrical portion of g the nut istprovided with the spaced notches or shoulders iiatthe lower, end thereof.

The upperiportion-of the nut 40is provided with the plate. portion 46which is likewise provided with the notches orshoulders 48 facing in an op posite direction to the shoulders 44. V

The nut is centrally threaded as at'50 for the reception of the vertically disposed operating screw,52, the lower endof which is provided with the cam or ring member fi i Adjacent the upper .end of theinner casingtherejs provided a housing 5ficwhichis slottedas at58, the slot being aligned withacorresponding slot-in the casing 36, the housing being provided withgthelocking dog '60 pivoted thereto asatqfil ;,The spring64 is interposed between the housing "and the leg 66 of the dogforjurgin'g theflatching' member 68 of said dog intoengagment with the notches 44.

-"Ihe*housin'g.is likewise'provided with the externaldog '(0 pivoted theretoas'at72; the spring 74 beinginterpos'e'd between; the lower end of the dog 'a nd the hliiisirigifol: normally urging the latching portion :76 of the dog toward engagement with the, shoulders 4 8"o ffthe nut. The upper end of the screw,isfiprovidedwith the. cam or ring member 78;"anti' friction bearings 80 being interposed between the cam and thethrust bearings 82 carried by the plunger 26. I p Thescrew is coupled to the motor 8i through the coupling 86, the motorbeing directly secured as at 88 to thetcenter plate 22 and preferably being provided with thetorque coupling 90 which serves to release the motor from the screw after a predetermined torque has been built up.

In some installations it is desirable to prevent rotation of the spaced tracks 10, in which case the ring 92 provided on the spaced angles 20 may be provided with a key or plunger 94 adapted to extend into a casing 96 disposed adjacent the casing 32- whereby rotation of the rails is effectively prevented. A'flatch or friction means may be interposed between the plunger 94 and angles 20 whereby it may be released or moved with respect to the rails to permit the rails to be revolved.

In operation of the device, assuming that the lift is in lowered position for reception of a vehicle from the adjacent ground, after the vehicle has been spotted on the spaced tracks, the

motor is operated by the closing, of a suitable switch (not shown). The rotation of the screw causes the spaced tracks to raise, the screw moving upwardly and the dog 60 preventing rotation 70f the. nut 40 with respectto the inner easing 36. Of course the current maybe shut off at any desired place. I 1? 1 1' i I If the current is not shut off, the cam member 54 will, at the top of the stroke of the screw, engage theleg 68to release said locking dog 60 from the shoulders 44 of the nut whereby con- :tinued rotation of the screw will merely cause the nut to rotatewith the screw, it being seen ,that the shoulders 48 are faced in an opposite direction from the shoulders 44 so that there will merely be a warning noise of the dog 70 falling into the shoulders 48 on the nut.

When it is desired to lower the lift after servicing of the vehicle has been completed, rotation of the. motor in-an opposite direction will of course cause the proper movementof the screw with respect to the nut to lower the lift, the nut being retained from rotation in an opposite direction by engagement of the dog 70 with the shoulders 48. 5 At its lowermost position the cam 78 will engagethe lock-legs 76 of the dog 70 to move it' out of engagement with the shoulders 48, and continued rotation or over-travel of the screw will merely cause a warning noise of the dog falling into the shoulders 44 of the nut.

The clutch 90 is interposed between the motor and the screw so that after a predetermmed torque is built up, as for example if the spaced rails should strike an object left under the rails, there would be a slippage between the motor and screw to prevent heating of the screw or injury to any of the parts. It is of course to be undere stood that a clutch of'the torque or friction type might be inserted in place'of the nut and locking dogs for permitting over travel at the top and bottomstrokes, as wellas after a predetermined torque is built up. 1

While a drive -ontype of lift is shown, it is of coursecontemplated that ,other' forms. such as the free wheeltype may be used, and it is to be understood that we do not wish, to be limited by the exact embodiment of the device shown, which is merely by way of illustration-and not limitation,

as various and other forms of the device will of course be apparent to those skilledin the art without departing from the spirit of the inven- :stufiingbox disposed at the upper'endofsaid casing, a hollow plunger mountedfor sliding movement in said casing'and' embraced by said .stufiing boxjthe bottom of saidpl'unger being open, the upper end of said plunger being provided with a crosshead fixed thereto, spaced vehicle carrying rails carried by said crosshead and disposed to be at ground level when said plunger is in lowered position, an inner fixed casing member secured to said casing and extending into and substantially concentric with said plunger, an internally threaded. nut journalled for rotation in said casing member and provided with shoulders disposed inwardly and outwardly of said casing member, a motor carried by said crosshead, a screw operated by said motor and extending through the threaded portion of said nut, locking dogs normally cooperating with said shoulders, and means on said screw for releasing one of said dogs at a limit of said screw for permitting over-travel of said motor.

2. In a lift, the combination of an outer casing adapted to be imbedded in the ground, a stufiing box disposed at the upper end of said casing, a hollow plunger mounted for sliding movement in said casing and embraced by said stufiing box, the bottom of said plunger being open, the upper end of said plunger being provided with a crosshead fixed thereto, spaced vehicle carrying rails carried by said crosshead and disposed to be at ground level when said plunger is in lowered position, an inner fixed casing member secured to said casing and extending into and substantially concentric with said plunger, an internally threaded nut journalled for rotation in said casing member and provided with shoulders disposed inwardly and outwardly of said casing member, a motor carried by said crosshead, a

screw operated by said motor and extending through the threaded portion of said nut, locking dogs normally cooperating with said shoulders, means on said screw for releasing one .of said dogs at a limit of said screw for permitting over-travel of said motor, and a coupling interposed between said screwand motor and adapted to release said screwfrom said motor. after a predetermined torque has been built up.

3. In a lift, the combination of an outer casing adapted to be imbedded in the ground, a stufiing box disposed at the upper end of said casing, a hollow plunger mounted for sliding movement in said casing and embraced by said stuffing box, the bottom of said plunger being open, the upper end of said plunger being provided with a crosshead fixed thereto, spaced vehicle carrying rails carried by said crosshead and disposed to be at ground level when said plunger is in lowered position, operating means for said plunger including a motor, a screw operated by said motor, a rotatable nut through which said screw extends, means normally preventing rotation of said nut with respect to said screw, and members carried by said screw for releasing said means at the upper and lower positions of said plunger to permit over-travel of said motor;

'4. In a lift, the combination of an outer casing' adapted to be imbedded in the ground, a stuffing box disposed'at the upper end of said casing, a hollow plunger mounted for sliding movement in said casing and embraced by'said screw, members carried by said screw for releasing said means at the upper and lower positions of said plunger to permit over-travel of said motor, and a coupling interposed between said screw and motor and adapted to release said Screw from saidmotor after a predetermined torque has been built up. 1 a

5. In a lift, the combination of an outer casing adapted to beimbedded inthe ground, a stufiing box disposed iatjthe upper endof said casing, a hollow plunger mounted for, sliding movement in said casing andembraced by said stuiiing box, the bottom of said plunger being open the upper end, of said plunger being provided with a crosshead fixed thereto, spaced. ve-,-

hicle carrying rails carried by said crosshead and disposed to be at ground level whensaid plunger is in lowered position, operating means for said plunger including .amotor, a screwroperated by said motor, a rotatable nut through which said screw extends, means normally preventing rotation of said nut with respect to said screw, and

members for releasing said means at the upper and lower positions of said plunger to permit over travelof said motor.

6. In a lift, the combination of an outer casing adapted to be imbedded in the ground, a stuffing box disposed at the upper end of saidcasing, a

hollow plunger mounted for sliding movement in said casing and embraced by said stunting box, the bottom of said plunger being open, the upper end of said plunger beingprovided with a crosshead fixedthereto,spacedvehicle carrying rails, carriedby ,said crosshead and disposed to be at ground level when said plunger is in lowered position, operating means for, said plunger including a motor, a screw operated by said motor, a rotatable nut through which said screw extends, means normally preventing rotation of said nut with respect to said screw,.members for releasing said means at the upper and lower positionsofsaid plunger to permit over travel of said motor,and

, bottom of said plunger being open, the upper end of said plunger being provided with a crosshead fixed thereto, spaced vehicle carrying rails carried by said crossheadand disposed to be at ground level when said plunger is in lowered position, an inner fixed casing member secured to said casing and extending into and substantially concentric with said plunger, an internally threaded nut journalled for rotation in said casing member and provided with shoulders disposed inwardly and outwardly of said casing member, a motor carried by said crosshead, a screw operated by said motor and extending through the threaded portion of said nut, and locking dogs normally cooperating with said shoulders.

8. In a lift, the combination of an outer casing adapted to be imbedded in the ground, a stuffing box disposed at the upper end of said casing, a hollow plunger mounted for sliding movement in said casing and embraced by said stufiing box, the bottom of said plunger being open, the upper end of said plunger being provided with a crosshead'nxed thereto, spaced vehicle carrying rails carried by said crosshead and disposed to heat ground levelwhen saidplunger is in lowered position, operating means for said plunger including a motor carried by said crosshead, a screwoperated by said motor, a rotatable nut through which said screw extends, said nut being carried byfsaid casing, means normally preventing rotation of said nut with respect to said screw, and

members carried by said screw for releasing said means at the upper and lower positions of said plunger to permit over-travel of said motor.- n.9, Ina lift, the combination of an outer casing adapted to be imbedded in the ground,.a stumng box disposed at the upper; end of said casing, a hollow plungermounted for sliding movement in said casing and embraced by said stufiing box, the bottom of said plunger being open, the upper end of said plunger being provided with a crosshead fixed thereto, spaced vehicle carryingrails carried by said crosshead and disposed to be at ground level when said plunger is in lowered position, operating means for said plunger includ-v ing a motor carried by said crosshead a screw operated by said motor, a rotatable nut through which said screw extends, said nut being carried by said casing, means normally preventing rotation of said nut with respect to said screw, and members for releasing said means at the upper and lower positions of said plunger to permit overtravel of said motor.

10. In a lift, the combination of an outer case ing adapted to be imbedded in the ground, a stuffing box disposed at the upper end of said casing, a hollow plunger mounted for sliding movement in said casing and embraced by said smiling box, the bottom; ofsaid plunger being open; the upper end of said plunger being provided with acrosshead fixed thereto, spacedxve* hicle carrying rails carried by said crosshead and. disposedto be at ground level when said plunger is in lowered position, operating means for said plunger including amotor carried by said crosshead, a screw operated by said motor,

a rotatable nut throughwhich said screw extends, said nut being carried by said casing, means normally preventing rotation of said nut with respect to said screw, members carried by said screw for releasing said means at the upper and lower positions of said plunger to permit 2 over-travel of said motor, and a coupling interposed between saidscrew and motor and adapted to release said screw from said motor after a predetermined torque has been built up.

11. In a lift, the combination of an outercasing adapted to be imbedded in the ground, a stufiing box disposed at the upper end of said casing, a hollow plunger mounted for sliding movement in said casing and embraced by said stuifing box, the bottom of said plunger being open, the upper end of said plunger being provided with a crosshead fixed thereto, spaced vehicle carrying rails carried by said crosshead and disposed to be at ground level when said plunger is in lowered position, an inner fixed casing member secured to said casing and extending into and substantially concentric with said plunger, an internally threaded nut journalled for rotation in said casing member and provided with shoulders disposed inwardly and outwardly of said casing member, a motor carried by saidcrosshead, a screw operated by said motor and extending through the threaded portionof said nut, a thrust bearing interposed between said screw and motor and carried bysaid plunger, lockingridogs normally cooperating with said shoulders, and meansv onsaid screw for releasing one of said dogs at a limit :of. saidscrew for permitting over-travel of said motor.

12. In a lift, the combination of anouter casingadapted to be imbedded in the ground, a

stuifing box disposed at the upper. end of said casing, a hollow plunger mounted for sliding movement in said casing :and embraced by said stufiing box, the bottom of said'plungerbeing open, the upper end o'fsaid plunger .being pro-' vided with a crossheadfixedthereto, spaced vehicle carrying rails carried .by said'icrosshead and disposed to be'atxground .level whenisaid plunger is in lowered position, an inner fixed casing member secured to said casing-and-extending into andsubstantially concentric with said plunger, an internally threaded nutejournalled for rotation in said casing member and provided with shoulders disposedinwardly and outwardly of saidcasing member,5a motor carried by said crosshead, a screw operated by said motor and extending throughthe-threaded portion of said nut, a thrust bearing interposed be-' tween saidscrew and motor and carriedbysaid plunger, locking dogs normally cooperating with said shoulders, means on said screw for releasing one of 'said. dogs at a'limit of said screw for permitting over-travel of said motor, and a coupling interposed between said screw and motor and adapted to release said'screw'from said motor after a predetermined torque has been built up. I 13." In a lift, the combination of an outer'casing adapted-to be imbedded in the ground, a stuffing box disposed at the upperend of said casing, athollow plungerv mounted for sliding movement in saidvc'a'singland embraced by said stuffing box, the bottom ofsaid-plunger being open, the upper-end of said plunger being provided with a 'crosshead fixed thereto, spac'edvehicle carrying rails carried-by said crosshead and disposed to =tbe at groundlevel when said plunger is in lowered position, operating means for said plunger including a motor, a 'screw op-' .erated by" said motor, a :tliru'st bearing inter-'- posed between said motorand screw, a' rotatable nut" through which said screw extends,:-mea'ns normally preventing rotation of said nut with respect to said screw, andimembers for releasing said meansat the upper andl'owerpositions of said plunger to permit over-travel of said motor.

1 4. In aliftfa support member, a load'carrying member,operating-"means forimoving said load carrying'member relative'to said supportniember, said means including a motor associated with one of said members, a screw operated thereby, a rotatable nut associated with the other of said members through which said screw-extends, means normally preventing rotation of said nut with respect to said screw in one direction, means a.

normally preventing rotationiof said nut with respect to said screw in the; other'direction', and means on said screw for releasing one'of said means after a predetermined movement of said load carrying: member for permitting over-travel of said. motor. l i -15.'In a lift, a support member, a load carrying member, operating means for moving said load carrying member relative to said support member, said means including a motor associated' with one of said members, a screw operated thereby, a rotatable nut associated with-the other of said members through which said screw extends and provided with shoulders, locking'dogs normally cooperating with said shoulders, and means on said screw for releasing one of said dogs at a limit of said screw' for permitting overtravel of'saidmotor. i i 16. In a lift, ahollow support member, a load carrying member, operating means for moving said load carrying member relative to said support member, said means including a motor associated with one of said'members, a screw operated thereby and disposed in said hollow support memon said screw for releasing said means-after pre- 3 determined movements of said loadcarrying member in respect to said support member in either of twodirections 1 7. In a'lift, a hollow support member, a load carrying member, operating means for moving said load carrying memberrelative to said supp'ort member, said means'including a motor associated with one of said members, a screw operated thereby and disposed'in said hollow support member, a rotatable nut mounted in said hollow support member through which said screw extends, dogs disposed inwardly andoutwardly of said support member normally preventing rotation of said nut with respect to said screw, and means on said screw for releasing one of said dogs" after a predetermined movement of said load carrying member relative to said support for permitting over-travel of said motor. a

ROBERT J. canon. ROSS H. ARNOLD. 

